Myr Welder + Crab Umbra + Nyx Lotus

Myr Welder

Crab Umbra

Nyx Lotus

How it works

1. Activate Myr Welder using Nyx Lotus's ability by tapping it, adding at least
2. Activate Crab Umbra by paying 2, untapping Myr Welder.
3. Repeat.

This elegant loop turns a modest construct into a self-contained mana engine. With Crab Umbra enchanting Myr Welder and Nyx Lotus safely resting in your graveyard, the Welder assumes the Lotus's great devotion-fueled tap ability via its imprint power. This lets you tap the Myr for a massive influx of blue mana, which immediately feeds the untap ability granted by Crab Umbra to ready the Myr Welder for another iteration. Because the mana produced outpaces the cost of the untap, you are left with an infinite supply of your chosen color.